142 "TERRA NOVA" EXPEDITION. 



♦ 

 termiual one, and an external tubercle at the base. There is no mandibular palp and 



no epipodite on the fifth thoracic limb. Submedian and intermediate carinae are 



present only on the last abdominal somite. The telson has twenty-two denticles 



between the submedian teeth and nine on each side between submedian and lateral. 



The uropods have five spines on the first segment of the cxopod, and the inner edge of 



the peduncular process is serrated with sharp teeth. 



The specimen apparently belongs to a species related to S. quadridens, Bigelow, 



but, although it is of exactly the same length as a post-larval specimen figured by 



Bigelow (1894, p. 548, fig. 28) as belonging to that species, it differs in many details, 



the propodus of the raptorial limbs being relatively broader, the uropods longer, etc. 



Some of the differences may possibly indicate a more advanced stage of development. 



3. Squilla, sp. [_Alima dilatata, Hansen]. 



Alima dilatata, Hansen, 1895, p. 95, pi. viii, figs. 12, 12a, 13. 



Occurrence. — Stations 39 and 40. Six miles off mouth of Rio de Janeiro Harbour. 

 Plankton at 2 metres depth. Ten specimens. 



Station 311. South Atlantic (off Eio de la Plata). Plankton at 2 metres depth. 

 Two specimens. 



Remarks. — The specimens, which range from 7 to 20 nun. in total length (in- 

 cluding rostrum), differ in various small details from Hansen's description and figures, 

 although they agree better with this than with any other larval form yet described. 

 The largest specimen, exceeding in size the largest recorded by Hansen, has no trace of 

 teeth yet visible on the dactylus of the raptorial limb. The uropod has six spines. 



4. Squilla, sp. \_Alhna macrophthalma, Brooks]. 



Alima macropUJialma, Brooks, 1886, p. 93, pi. vii, figs. 1-6, pi. viii, figs. 1-3. 



Occurrence. — Station 86. Off Three Kings Islands. Plankton at 3 metres 

 depth. One specimen. 



Station 110. (Near Three Kings Islands.) Surface-plankton. One specimen. 



Remarks.- — The larger of our two specimens (total length 21 mm.) agrees very 

 well with that figured by Brooks in his PI. viii, fig. 3, although somewhat exceeding it 

 in size. The smaller (total length 16-5 mm.) has longer postero-lateral spines on 

 the carapace, and approaches the A. macrocephala of Jurich (1904, p. 380, pi. xxvii, 

 figs. 1, Ic). 



■^tu^ 



5. Pseudosquilla ciliata (Fabr.) [Pseuderichthus communis, Hansen]. 



PseudericlUhus communis, Hansen, 1895, p. 86, pi. viii, figs. 5-5b. 



Occurrence. — Stations 45, 47, and 49. South Atlantic, off Brazilian coast. 

 Surface-plankton. Nine specimens. 



Remarks.— 1\ie. specimens, which do not exceed 11 mm. in total length, resemble 



