362 DR MURRAY ON THE DEEP AND SHALLOW-WATER MARINE FAUNA 



*Polyno'e (Admetella) longipedata, M'Intosh. 

 *Praxilla ahyssonini, IM'IntoSh. 

 *Trophonia ivyvillei, M'lntosb. 



Myzostomida : 



*Myzostoma com2:>ressimi, Graff. 



* ,, coronatum, Graff. 

 *Stelechopus hyocnni, Graff. 



OSTEACODA : 



Bairdia ^ hosquetiana, Brady. 

 Cythere ^ acanthoderma, Brady. 



„ dasyderma, Brady. 



,, dictyon, Brady. 



* ,, viminea, Brady. 

 *Cytheroptei'on abyssorum, Brady. 



,, mucronalatum, Brady. 



Krithe jyroducta,^ Brady. 

 Macrocypris similis, Brady. 



CiRRIPEDIA : 



*Scalp)ellum * antarcticum, Hoek. 



* ,, hrevicannatum, Hoek. 



* ,, Jiavum, Hoek. 



* ,, improvisuni,, Hoek, MS. 



* „ p?a?«(?u, Hoek. 



* „ fcnue, Hoek. 



' Bairdia is a widelj' dispersed genus, attaining, apparently, its greatest development in the tropical and southern 

 seas, in dredgings from which regions the number of specimens of Bairdia not unfrequently exceeds that of all other 

 Ostracoda together ; the individuals, however, though numerous, are usually found to belong in each gathering to one, 

 or at most two, predominant species. — (G. S. Brady, ZwA. C'hall. Exp., part 4, p. 48.) 



' The genus Cytliere includes probably nearly as many species, recent and fossil, as all the remaining genera [of 

 Ostracoda] put together, the number assigned to it in this monograph being 83 out of a total of 221. But though in 

 its present form excessively unwieldy, it seems irajjossible, without a more perfect knowledge than we yet possess of 

 the variations of anatomical structure in the several species, either to form useful sub-genera, or to separate from the 

 main group any true generic types. — (Brady, Zool. C'Imtl. Exp., i>art 4, p. 62.) 



^ This species [Krithe producta] is either a cosmopolitan one, and very variable as to shape, or the figures given 

 under its name, which are fairly representative of many different examples, must belong to other undescribed species. 

 I prefer, however, to consider them as forms of Krith: 'j/rodiuiu, the variations observable in a large series of specimens 

 being almost countless, and, as I think, in many cases fairly referable to differences of age, sex, or race. — (Brady, 

 Zool. Oinll. Exp., ijart 4, j). 114.) 



"* Scalpellum seems to lie the only genus of Cirripedia which is often met with in the great depths of the ocean. 

 This strikingly coincides with the common occurrence of this genus in the fossil deposits, especially in secondary strata 

 (Cretaceous period). . . . The great number of species in this- genus suggested the idea of dividing it into smaller 

 genera. After careful examination this idea, however, has been given up, as all the species in essential characters 

 corresjKjnd as closely, even more closely, with one another than in any other genus of Cirripedia. Nor has it been an 

 easy matter to arrange the species in a natural way.— (Hoek, Zool. Clwtll. Exp., part 25, p. 60.) 



