REPORT ON THE AMPHIPODA. 591 



Gen. 5. Calamorhynchus, H. Streets, 1878, has the one species, " C. peUucidus, H. Streets, 

 1878." 



" Gen. 6. Rh.ahdonedes, n.," a name suLstituted for Ehahdosoma preoccupied, is thus defined : — 



"Body very elongated, rod-like. Head elongated, with a distinct neck, and a very long, 

 needle-shaped rostrum. Tibiae and carpi are linear, but periodically intumesced in the 

 female. Seventh pair rudimentary. Oviteotriees wanting. Peduncles of uropoda very 

 elongated and narrow. Telson very long, needle-shaped." 



The species assigned are "1. HIi. armatu>t, H. Milne-Edwards, 1840;" "2. Rh. Wliitci, Spence 

 Bate, 1862," the definitions given being inconsistent with Glaus' view that the latter 

 species is not distinct, but the male of the former. The name Macroceyhalus, given to 

 this genus by Spence Bate in 18.58, had been used several times before, and therefore, like 

 Rliahdutoma, must yield to Rhahdonedes. 



Fam. 14. PEONOiDiE, Glaus, 1879. 



Gen. 1. Pnmoe, Guerin-Menevilie, 1836, has the single species "P. capifo, Guerin-Meneville, 

 1836." Gen. 2. Euprono'i, Glaus, 1879, haa five species, " 1. E. maculata, Glaus, 1879;" 

 "2. E. nmmta, Glaus, 1879;" "3. E. hrunnea, Dana, 18.52," (it being apparently taken 

 for granted that Euproiwii armata, Claus, is the same species); "4. E. laaerocephala, 

 n. sp.;" "5. E. ornata, n. sp." Gen. 2 [3]. Amphipjmno'e, Spence Bate, 1862, has the 

 one species "A. ctiyndata, Spence Bate, 1862." Ampldpronoe serrulata. Streets, 1877, is 

 not noticed. "Gen. 3 [4]. Parapronoe, Claus, 1879," receives four species, "1. F. crustu- 

 lum, Glaus;" "2. P. parva, Claus, 1879;" "3. P. agilis, n. sp.;" "4. P. atlantica, n. sp." 



Fam. 15. Paeascelid^, Claus, 1879. 



Gen. 1. Thyropus, Dana, 1852, is tacitly substituted for the genus Tamjscdus of Claus, and 

 receives three species, "1. Th. diaphanus, Dana, 1852;" "2. Th. sphxroma, Claus, 

 1879," [this being Glaus' Tanyscehis sphseroma {Tliyropus diaplmnus, Dana?)]; 3. "Th. 

 atlanticus, n. sp." 



Gen. 2. Parascelus, Glaus, 1879, has the .species "1. P. Edwardsi, Claus, 1879;" "2. P. 

 typlwides, Claus, 1879;" "3. P. p>arms, Claus, 1879;" "4. P. nasutus, n. sp." 



Gen. 3. Schizoscelus, Claus, 1879, has the species " 1. S. m-natus, Claus, 1879 ;" "2. S. rapar, 

 H. Milne-Edwards, 1830," the reference being to Milne-Edwards' Typhis rapax. 



Gen. 4. Euscehis, Claus, 1879, has one species, '■'■ E. rohudus, Glaus, 1879. 



Fam. 16. EuxYPHiDiE, Dana, 1852." 



"Gen. 1. Eutyphes, Claus, 1879," (a note on the name, with •which I by no means agree, 

 explaining that "Typhis must be corrected to Typhes "), contains five species, "1. E. 

 ovoides, Risso, 1816;" "2. E. armatus, Claus, 1879;" "3. E. r/lohosus, Claus, 1879;" 

 "4. E.ferus, H. Milne-Edwards, 1830," [Typhis ferw, M.-Edw.]; "5. E. for/ex, n. sp." 



"Gen. 2. Dithyrus, Dana, 1852," which Claus makes a synonym of Eidyphis, is here 

 re-established as a separate genus, tacitly superseding Ilemityphis, Claus, of which it 

 is made to include both the species; it receives in all four species, "1. D. faba, Dana, 

 1852;" "2. D. tenuimamis, Glaus, 1879;" "3. D. cmstulum, Claus, 1879;" "4. D. 

 stc'Uatus, n. sp." 



"Gen. 3. Paratyphes, Claus, 1879," has the spelling altered from Paratyphis, Claus. It receives 

 the species "1. P. macuJatus, Claus, 1879;" "2. P. Theeli, n. sp." 



Gen. 4. Tetrathyrus, Claus, 1879, has three species, "1. T. fordpatus, Claus, 1879;" "2. T. 

 redangularis, n. sp.;" "3. T. inscriphis, n. sp." 



Gen. 5. Aiiiphithyrus, Claus, 1879, receives four species, the fourth being "A. inermis, n. sp." 



The new genera here constituted are nine in number, independently of those re-established or 

 named afresh. Short descriptions are given of forty-live new species. The work contains 

 diagnoses of the several families, which it will be more convenient to notice in the 

 descriptive part of this Report. 



