CALIF0E2>:iA CUMACEA — ZIMMZB, 425 



The anterior margm of t^ie .second free thoracic segment in lateral 

 view ajjpears as high as the carapace. Posteriorly it falls off gradu- 

 ally to meet the dorsum of the third somite. Its posterior margin in 

 dorsal view is produced to form an obtuse angle fitting into the ante- 

 rior margin of the following somite, which is shaped to receive it. 



The articulation between the antepenultimate and penultimate 

 joints of the first pereiopod reaches about as far forward as the tip of 

 the pseudorostral tooth. The basis is distinctly longer than the distal 

 joints taken together and carries no distally projecting tooth. The 

 last three joints are to one another approximately as 9 : 10 : 6. 



The uropods (fig. 34. 7j) are about as long as the penultimate ab- 

 dominal somite. Their peduncle attains about ly^^ times the length 

 of the last abdominal somite. The exopod is fully two-thirds as long 

 as the peduncle. The endopod is somewhat shorter than the exopod. 

 On its inner margin there are about nine spines: distally it is not 

 pointed but truncate and armed with a strong terminal spine. 



Color. — The alcoholic specimen shows traces of its former coloring 

 in lighter or darker brown areas. The subrostral angle is quite dark, 

 and from it extends a narrow brown stripe, at first about parallel with 

 and a little removed from the edge of the subrostral notch and then 

 turning off to run down toward the ocular lobe. An indistinct brown 

 spot is present on the mid dorsum of the posterior end of the carapace. 

 The second and third free thoracic somites are somewhat mottled or 

 beclouded in color but unsymmetrically so. The coloration on the last 

 thoracic and first abdominal somites is more distinct. Finally, traces 

 of pigmentation still persist on the first three pairs of pereiopods. 



Length. — About 6 mm. 



Occun-ence. — ^A single adult female, the unique holotype ( U..S.X3I. 

 no. 71437) is from off Corona Del Mar. Calif.. 7 fathoms. Mav 17. 

 1933 (no. 33). 



RemM'rh^. — For the many and diverse species of the genus Cy- 

 do^spis. Caiman - gives a key in which our new species falls into the 

 same category (B, a. 6, B'— b'— 2) wdth C. levh G. M. Thomson. 

 These two species possess the following characters in common (cer- 

 tain characters are also added here on the basis of later described 

 species) : Eye present, carapace wholly smooth, without ridges, ribs, 

 or folds, without large tubercles, without strong teeth on the mid- 

 dorsal carina, peduncle of the uropods not more than twice as long 

 as the branches, basis of the first pereiopod without projecting tooth 

 at the end. carapace less than one-third as long as the entire body, 

 basis of the first pereiopod not twice as long as the distal joints taken 

 toirether. 



= Trans. Zool. Soc. London, vol. IS, pt. 1, no. 1, p. 6. 1^')~. 



